Build Your Own PC (BP) By R. A. Penfold

Electronic Music Projects by Penfold, R. A. Paperback Book - Classic!

Preamplifier and Filter Circuits (BP309) by R. A. Penfold

Interfacing PCs and Compatibles by R. A. Penfold Paperback

Easy PC Troubleshooting (BP) By R. A. Penfold

Living Well by Design: Melissa Penfold―How to create a home that engages y...

How to Interface PCs: 467 (BP S.) by Penfold, R. A. Paperback / softback Book

Modern Optodevice Projects by Penfold, R. A. Paperback Book